What I did though was worse because it wasn't one dumb mistake, it was many.
- Wrote down completely illogical bull**** which makes no sense at all, an example of which was accidentally writing (in effect) "Assume X is true." for a question that said "Prove X is true." Examiner got so confused by that and other weirdness in that question that he gave me no marks. Few of those.
- Answered the "wrong" question, ie. didn't read the question properly, got confused
- Accidentally skipped parts of questions for no apparent reason, often easy parts
- Failed to notice an entire question actually existed, first I found out about it was upon getting the exam back.